Closure for jars.



U. U. PARKER. CLOSURE FOR JARS. APPLICATION FILED FEB.20, 1909.

93,583% Patented Sept. 21, 1909.

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' CHARLES C. PARKER, OF BALTIMORE, MARYLAND, ASSIGNOR 'IO"HAGERSTOW1 I GAP 4 COMPANY, A CORPURATION 01E" MARYLAND.

CLOSURE FOR- JARS.

T 0 all whom it may. concern;

Be it known that I, CHARLES C. PARKER, of the city of Baltimore and State of Maryland, have invented certain Improvements in Closures for Jars, of which the following is a s ecificationhis invention relates to. certain improvements in that class of closures for jars, in which a cap formed of a disk of pulpboard isprovided with a tab which serves as means whereby the disk can be removed from the .mouth of the jar; and it consists in a peculiar construction of the tab, and the means whereby it is reinforced and prevented from being torn from the disk of which it is a part, in the act of opening the jar, as will hereinafter fully appear.

In the further description of the said invention which follows, reference is made to the accompanying drawing, forming a part hereof, and in which,'

Figure 1 is a perspectiveview of the upper end of a milk ar to which is applied the improved closure, and Fig. 2 is an enlarged perspective view of the closure alone. Fig.

3 is an enlarged top view of the closure before its completion, and Fig. 4 is an enlarged diametric section of the closure as it appears when completed and ready for insertion into the mouth of the jar. Fig. 5 shows the closure as applied to a jelly glass, together with a plain disk which is laid on its contents, and with a space existing between the two closing devices.

Referring now to Figs. 1, 2, 3 and 4, 1 is the top of an ordinary milk jar having the usual annular seat, not shown, for the closing device.

2 is a disk of pulpboard of homogeneous material, that is to say,-it is in one piece and not formed oftwo or more thicknesses held together by means of paste or other adhesive.

In the manufacture of the closure, a circular disk is stamped from a sheet or strip of pulpboard, and at the same time, or subsequently thereto there is formed in the disk by means of any suitable cutting tool or appliance, and near its circumference, a U sha ed cut (1 having a depth which is practica y equal to one half the thickness of the Specification. of Letters Patent.

Patented Sept. 21, 19(99.

Application filed February 20, 1909. Serial in. 479,251.

and immediate thereto is depressed to form a channel 6 which extends to the bottom of the cut.

At some stage in the'manufacture of the. closure, the root of the portion of the disk which is partially inclosed by the cut is provided with a staple c the ends of which are clenched at the underside of the disk for a. purpose hereinafter described.

' To complete the closure, the portion of the disk which is within the U shaped cut is pressed upward to produce the lifting tab 3 which, due to the depth of the cut a, has a thickness. equal'to one half that of the disk. This method of producing the tab by pressing upward theportionof the disk underneath the part inclosed within the U shaped cut, has proved very satisfactory, as in the operation, the material. splits horizontally on ily than the adjacentparts.

After raising the tab as described, the en-- tire device is paraflined to render it impervious to air and moisture.

It will be understood from the foregoing description, that I have produced a satisfactory closure with a removing or lifting tab from a single thickness of pulpboard without perforating it; and that the tab is so strengthened by the reinforcing staple c, that it will not be torn from the disk by any strain to which it is likely-to be subjected in the portion of the disk beneath, but I do not confine my invention to such expedient, as

other means may be employed, and the same result produced.

In Fig. 5 the closure is shown as seated in the mouth of what is termed a jelly glass, and in connection with a plain disk at which rests on the body of jelly denoted by 4. In this use of the invention, the closure is intended as protection to the inner disk which may be made of thin paper and is effective as means to exclude air from the contents of the glass but not adaptedto resistaccidental perforation. I'cla1m 'as my. 1nvent1on,-

1; A closure for a' milk jarwhich consists of a pulpboard diskin one thickness,- having a lifting tab formed by thehorizontal, splitting'and raising of a portion of the same, substantially as specified. 1O

2. A closure for a milk jar, which consists of a pulpboard fdisk'in one thickness having a portion of the same partially surrounded by a out which extends a limited distance through the disk, and then raised at the cut end to produce a lifting tab, the; material being split horizontally in the operation, substantially as specified.

3. A closure for a milkjar, which con- ,sists of a pulpboard disk in one thickness having a portion of the same partially surrounded by av cut Which extends a limited distance through the disk, and is then raised 1 at the'cut end to produce a lifting tab, the

. Isomaterial being split horizontally in the operati0n,--and a reinforcing staple at the root r of the tab, substantially as specified.

4, A closure for a milk jar which consists of a pul-pboard disk in one thickness having.

a portion of the same partially surrounded by a out which extends. a limited distance ing a through t e ass and the material'exterier of and adjoining the cut channeled, the cut end of the inclosed part being raised to 'pro- Y duce a lifting) tab, and split horizontally from the part eneath, substantially as speclfied.

5'. A closure for ajmilk jar which consistsof a strawboard disk in 'one'thickness havportion of the same partially sur rounde by a out which extends a limited distance throughthe disk, the material ex terior of'and adjoining the cut' being channeled, and the cut end of the inclosed' part raised to produce a lifting tab the portion which is raised being split horizontally from substantially as specified.

45 the part beneath and reinforced by a staple,

6. A closure for a milk jar, which con f sists of a strawboarddisk in one thickness, having a lifting tab formed by the horizon 

